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TI-2021-09228 Aliases CVE-2021-27888GHSA-3q9w-xx57-q783

ZendTo before 6.06-4 Beta allows XSS during the display of a drop-off in which a filename has unexpected characters.

Priority LOW 28CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-79.

Summary

ZendTo before 6.06-4 Beta allows XSS during the display of a drop-off in which a filename has unexpected characters.

Why it matters now

EPSS 0.00646 51st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 4

CPEVersionsRoleVendor
cpe:2.3:a:zend:zendto:*:*:*:*:*:*:*:*up to 6.05-4VulnerableZend
cpe:2.3:a:zend:zendto:6.06-1:beta:*:*:*:*:*:*6.06-1 betaVulnerableZend
cpe:2.3:a:zend:zendto:6.06-2:beta:*:*:*:*:*:*6.06-2 betaVulnerableZend
cpe:2.3:a:zend:zendto:6.06-3:beta:*:*:*:*:*:*6.06-3 betaVulnerableZend
  • cpe:2.3:a:zend:zendto:*:*:*:*:*:*:*:* Versions up to 6.05-4 Vulnerable ·Zend
  • cpe:2.3:a:zend:zendto:6.06-1:beta:*:*:*:*:*:* Versions 6.06-1 beta Vulnerable ·Zend
  • cpe:2.3:a:zend:zendto:6.06-2:beta:*:*:*:*:*:* Versions 6.06-2 beta Vulnerable ·Zend
  • cpe:2.3:a:zend:zendto:6.06-3:beta:*:*:*:*:*:* Versions 6.06-3 beta Vulnerable ·Zend

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-27888
  2. 2026-10-03 Alias added: GHSA-3q9w-xx57-q783
  3. 2026-10-19 EPSS moved to the 50th–90th percentile

References

Advisory 1

  • TI-2020-07210 lib/NSSDropbox.php in ZendTo prior to 5.22-2 Beta failed to properly check for equality… CVSS 3.1CRITICAL 9.8
  • TI-2020-07209 ZendTo prior to 5.22-2 Beta allowed reflected XSS and CSRF via the unlock.tpl unlock user functionality. CVSS 3.1HIGH 8.8
  • TI-2020-07208 lib/NSSDropbox.php in ZendTo prior to 5.22-2 Beta allowed IP address spoofing via the X-Forwarded-For header. CVSS 3.1HIGH 7.5
  • TI-2018-16063 Zend.To version Prior to 5.15-1 contains a Cross Site Scripting (XSS) vulnerability in… CVSS 3.0MEDIUM 6.1
  • TI-2013-05598 Cross-site scripting (XSS) vulnerability in lib/NSSDropoff.php in ZendTo before 4.11-13… CVSS 2.0MEDIUM 4.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences